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Technology is developed by all nations over time.

MechanicsEdit

Players may devote 1-12% of their budget to research at any given time. The default is 8%, with diminishing returns for higher levels. The money spent on research is invested in the various fields of technology that a player has unlocked. Fields may be set to High, Medium, or Low priority, which will affect the research speed in that field. 

In each field, a tech is chosen to research whenever a previous tech completes. Each tech has a chance of being skipped, so tech will not always be researched in the same order. If the tech chosen is too far advanced, no budget will be invested in that field, and the funds will be re-allocated to fields with valid research options. 

AI nations will also occasionally offer to buy tech from the player, or sell tech to the player. You may choose whether to accept in either case. Typically, a tech is worth roughly 4000-5000 on very large fleet size. Alliance (Security Agreements) with other nation increase the chance of technology trade offers from AI, with better price for the player. 

As any technology can be purchased from another nation. In this case RP used in that field are used on another technology even in case that technology which was purchased was under research. The idea is that research is done in that field not technology and as RPs are accumulated, certain technology is researched even if in game save there is technology which is under research.

(Exact mechanics TBD)

Technology FieldsEdit

The following fields of technology may be researched by players:

Technology information Edit

Level and name Edit

Level is the number shown in the tech screen.

Year Edit

Each technology has a nominal year of development. Beginning research on a technology in game before that year is reached will result in the number of research points per turn generated in that area being reduced until that game year is reached. It is intended by the game developers as a balancing tool to somewhat limit the technology gap between larger, richer nations and smaller, poorer nations over the full course of the game.

Proliferation Edit

After any country researches a technology with a "Y" for proliferation, it becomes more likely for other countries to select it for research as well. These "Y" technologies tend to be ones that are visible either externally on a ship or when the ship is being visited/inspected. For example, once the first nation works out triple turrets or installs a 12 foot rangefinder, other rival nations are going to be more interested in researching that technology as well since they've now seen the first nation implement it.

Chance Edit

This is the percent chance of that particular technology having research commence on it after the previous technology is completed (or was skipped). So technologies with 100 listed are never skipped.

Cost Edit

This is the multiple of 20,000 research points (RP) needed for the technology to be researched. So a 3 would mean the technology requires 60,000 RP to complete, a 10 would require 200,000 RP, etc. Research points in each individual research area resets to zero after successfully completing researching a technology in that area.

Effect Edit

The final column is a general listing of the effect of that technology.

1) Machinery Development Edit

Coal is initially the only fuel available. Coal is the least fuel efficient, meaning that more weight is required to increase a ship's range. It also requires stokers to shovel coal into the furnace. During long engagements, the stokers can become tired, resulting in a drop in the ship's top speed. The higher a ship's speed is set during battle, the faster they become tired. On the other hand, coal remains the cheapest option throughout the game. The coal bunkers also add some protection by absorbing damage from shots that hit them.

Before 1920, oil is only available if the nation controls a territory that has oil. If a nation has oil fired ships and loses the territory that has oil, then all oil fired ships will be forced to remain in port (thus unusable). Likewise, blockades can keep oil from reaching the home territory. As of 1920, oil becomes commonly available to all nations, and having a territory with oil is no longer required to use oil fired engines.

Lv. Tech Year Prolif Chance Cost Effect
1 Improved surface condenser 1900 N 100 3 1% weight saving on machinery
2 Cockburn safety valve 1901 Y 100 4 1% weight saving on machinery
3 Side drums 1902 Y 100 6 1% weight saving on machinery
4 Preheater 1903 N 100 6 1% weight saving on machinery
5 Steam Turbines 1904 Y 100 8 Considerable weight savings on machinery
6 Small tube boilers I 1905 N 80 8 1% weight saving on machinery
7 Oil firing 1905 Y 80 8 Enables oil firing if access to oil
  • No stokers needed for liquid fuel
  • Somewhat lighter than coal engines
8 Economizer 1906 Y 100 5 1% weight saving on machinery
9 Small tube boilers II 1908 N 80 8 1% weight saving on machinery
10 Superheater 1912 N 100 10 1% weight saving on machinery
11 Circulation augmenter 1914 N 100 10 1% weight saving on machinery
12 Reduction gears 1916 N 80 10 Increases endurance
13 Water wall furnace 1918 N 100 10 1% weight saving on machinery
14 Advanced superheater 1920 N 80 10 1% weight saving on machinery
15 Double reduction gears 1922 N 80 14 1% weight saving on machinery
16 Forced circulation 1924 N 100 10 1% weight saving on machinery
17 Large diesel engines 1925 N 50 10 Enables diesel engines on ships
  • More fuel efficient than oil
  • Improved acceleration
  • Heavier than oil for short ranges
18 Turbo electric drive 1926 N 100 12 1% weight saving on machinery
19 Improved oil burners 1928 N 100 10 1% weight saving on machinery
20 350 psi steam plant 1930 N 100 10 1% weight saving on machinery
21 Vulcan clutch 1934 Y 100 10 Increases endurance
22 500 psi steam plant 1935 N 100 10 1% weight saving on machinery
23 Variable pitch propellers 1937 N 100 10 Improves range for cruisers.
24 Improved high pressure steam plants 1941 N 100 10 1% weight saving on machinery
25 Supercharged diesels 1943 N 70 10 Reduces weight of diesel engines by 10%
26 Lightweight engine component materials 1945 N 100 10 1% weight saving on machinery
27 Forced lubrication 1947 N 100 10 1% weight saving on machinery

2) Armour Development Edit

Lv. Tech Year Prolif Chance Cost Effect
1 Krupp armour 1900 Y 100 3 Gradual improvement of armour quality
2 Face hardening 1902 N 100 6 Gradual improvement of armour quality
3 Quality control 1904 N 100 8 Gradual improvement of armour quality and 1% weight saving
4 Improved annealing 1906 N 100 8 Gradual improvement of armour quality
5 Krupp Cementit 1908 Y 100 8 Gradual improvement of armour quality
6 Quality control II 1910 N 100 10 Gradual improvement of armour quality and 1% weight saving
7 Improved armour bracing 1912 Y 90 10 2% weight saving on armour
8 Improved face hardening 1914 N 90 10 Gradual improvement of armour quality
9 Improved homogenous armour 1916 N 100 14 Gradual improvement of armour quality
10 Inclined belt 1916 Y 90 16 Enables inclined belt
11 Improved armour testing methods 1920 N 80 14 Gradual improvement of armour quality and 1% weight saving
12 Internal belt 1922 Y 80 14 Gradual improvement of armour quality
13 Interlocked armor plates 1921 N 80 14 Gradual improvement of armour quality
14 Integral Armour 1923 N 80 14 2% weight saving on armour
15 Decapping belt 1924 N 80 14 Gradual improvement of armour quality
16 Advanced face hardening 1926 N 80 14 Gradual improvement of armour quality
17 Advanced alloying 1928 N 80 14 Gradual improvement of armour quality
18 Microphotography for armour breakage studies 1930 N 80 14 Gradual improvement of armour quality
19 Post-hardening tempering process 1932 N 80 14 Gradual improvement of armour quality
20 X-Ray quality testing 1934 N 80 14 Gradual improvement of armour quality
21 Reduced impurities 1935 N 80 14 Gradual improvement of armour quality
22 Temper brittleness mastered 1937 N 80 14 Gradual improvement of armour quality
23 Improved armour face toughness 1939 N 80 14 Gradual improvement of armour quality
24 Micro alloy additions (vanadium, boron, copper) 1941 N 80 14 Gradual improvement of armour quality
25 Thermo mechanically treated armour materials 1944 N 80 14 Gradual improvement of armour quality

3) Hull Construction Edit

Lv. Tech Year Prolif Chance Cost Effect
1 Improved riveting techniques 1901 Y 100 6 1% weight saving on hull
2 High tensile steel 1902 Y 100 6 1% weight saving on hull
3 Basic weight control 1903 Y 100 8 1% weight saving on hull
4 Testing tank for hull form 1904 N 80 6 Reduces engine HP requirements
5 Improved rolled shipbuilding steel 1904 Y 100 6 1% weight saving on hull
6 Longitudinal framing 1905 N 100 7 1% weight saving on hull
7 Improved weight control 1908 Y 100 6 1% weight saving on hull
8 Hydraulic riveting 1910 Y 100 6 1% weight saving on hull
9 Better steel quality 1911 Y 100 8 1% weight saving on hull
10 Improved longitudinal framing 1914 N 100 10 1% weight saving on hull
11 Slender hull girders 1916 Y 100 12 1% weight saving on hull
12 Improved design calculations 1918 Y 100 12 1% weight saving on hull
13 Weight saving 1920 Y 100 12 1% weight saving on hull
14 Partial welding 1922 N 100 12 1% weight saving on hull
15 Hydrodynamic hull form 1922 N 80 12 Reduces engine HP requirements
16 Lightweight fittings 1923 Y 100 12 1% weight saving on hull
17 Lightweight scantlings 1925 N 100 22 1% weight saving on hull
18 Welded hull 1930 Y 100 20 1% weight saving on hull
19 Improved welding 1934 Y 100 22 1% weight saving on hull
20 Lightweight materials 1938 Y 100 22 1% weight saving on hull
21 Advanced welding 1942 Y 80 22 1% weight saving on hull
22 High-strength alloyed steel 1944 N 80 15 1% weight saving on hull
23 Plastic interior fittings 1949 Y 100 22 1% weight saving on hull

4) Fire Control Edit

Lv. Tech Year Prolif Chance Cost Effect
1 Coincidence rangefinder 1900 Y 100 3 Gradual national accuracy improvement
2 6 ft rangefinder 1902 Y 100 4 Gradual national accuracy improvement
3 Central firing 1903 Y 100 6 Enables Central Firing FC system on ships
4 Range calculator 1903 N 90 6 Gradual national accuracy improvement
5 Control tops 1904 Y 90 7 Gradual national accuracy improvement
6 Automatic range transmitter 1905 N 100 5 Gradual national accuracy improvement
7 9 ft rangfinder 1905 Y 100 5 Gradual national accuracy improvement
8 Mechanical fire control computer 1905 N 90 6 Gradual national accuracy improvement
9 Stereoscopic rangefinder 1906 N 40 5 Gradual national accuracy improvement
10 Plotting table 1908 Y 90 6 Gradual national accuracy improvement
11 Target designator 1911 N 90 8 Gradual national accuracy improvement
12 Director firing 1912 Y 100 8 Enables Director FC system on ships
13 12 ft rangefinder 1912 Y 100 8 Gradual national accuracy improvement
14 Ladder shooting 1912 N 70 10 Gradual national accuracy improvement
15 Gyro stabiliser 1913 N 80 10 Gradual national accuracy improvement
16 15 ft rangefinder 1914 Y 80 10 Gradual national accuracy improvement
17 Secondary director 1914 N 80 10 Enables directors for secondary battery and for CL
18 Improved Director 1918 N 100 15 Enables Improved Director FC system on ships
19 Synthetic fire control computer 1922 N 100 14 Reduces penalty for own ship turning
20 Advanced director 1926 Y 80 22 Enables Advanced Director FC system on ships
21 Secondary director for CL 1926 Y 80 22 Enables secondary director on CL
22 Improved optics quality 1933 Y 90 22 Gradual national accuracy improvement
23 Electro optical director 1942 N 80 22 Enables Electro Optical Director FC system on ships
24 Improved electro optical director 1946 N 80 22 Gradual national accuracy improvement
25 Early electronic gunnery computer 1948 N 80 22 Gradual national accuracy improvement
26 Improved electronic gunnery computer 1954 N 80 22 Gradual national accuracy improvement
27 Increased electronic computing power 1957 N 80 22 Gradual national accuracy improvement

5) Subdivision and Damage Control Edit

Lv. Tech Year Prolif Chance Cost Effect
1 Double bottom 1901 Y 100 6 Gradual damage control improvement
2 Improved subdivision 1903 N 80 6 Gradual damage control improvement
3 Torpedo protection I 1906 N 80 6 Enables Torpedo protection I on ships
4 High capacity pumps I 1908 N 80 8 Gradual damage control improvement
5 Torpedo protection II 1909 N 50 8 Enables Torpedo protection II on ships
6 Extended double bottom 1910 N 50 9 Gradual damage control improvement
7 High capacity pumps II 1912 N 50 9 Gradual damage control improvement
8 Diesel generators 1914 N 50 10 Gradual damage control improvement
9 Triple bottom 1916 N 50 12 Gradual damage control improvement
10 Improved firefighting equipment 1917 N 50 10 Gradual damage control improvement
11 Torpedo protection III 1919 N 50 12 Enables Torpedo protection III on ships
12 Improved counterflooding equipment 1923 N 50 14 Gradual damage control improvement
13 Torpedo protection IV 1924 N 50 12 Enables Torpedo protection IV on ships
14 Non flammable materials 1924 N 50 14 Gradual damage control improvement
15 Improved watertight hatches 1925 N 90 12 Gradual damage control improvement
16 Improved damage control practices 1930 N 90 14 Gradual damage control improvement
17 Increased fire hazard awareness 1935 N 90 14 Gradual damage control improvement
18 Portable pumps 1939 N 90 14 Gradual damage control improvement
19 Built in foam extinguisher systems 1940 N 90 14 Gradual damage control improvement

6) Turrets and Gun Mountings Edit

Initial turret limitations as of 1900:

  • -20% ROF for primary multi-barrel turrets below 7 inches, and -10% at 8 inches
  • -20% ROF for secondary single turrets below 8 inches
  • -40% ROF for secondary multi-barrel turrets below 7 inches, and -20% ROF at 7 inches
  • No more than 2 barrels per turret
Lv. Tech Year Prolif Chance Cost Effect
1 Hydraulic recoil 1900 Y 100 3 Gradual national ROF improvement
2 Power rammers 1901 Y 100 5 Gradual national ROF improvement
3 Pneumatic recuperator 1903 N 100 6 Gradual national ROF improvement
4 Improved turret design 1904 N 90 6 1% Weight saving on turrets
5 Mechanical shell handling 1905 Y 100 5 Gradual national ROF improvement
6 Improved hoists 1906 N 100 5 Gradual national ROF improvement
7 Triple turrets 1908 Y 80 8 Enables triple turrets
8 Hydraulic rammers 1908 N 100 6 Gradual national ROF improvement
9 Reliable power training and elevation 1914 N 60 7 Reduces ROF penalty for guns below 8 inches in turrets
10 Improved triple turrets 1914 Y 70 12 Eliminates ROF and reliability penalty for triple turrets
11 Quadruple turrets 1914 Y 50 10 Enables quadruple turrets
12 Increased elevation 1916 Y 90 12 Enables increased elevation
13 Dual purpose mounting 1917 Y 70 12 Enables 3 and 4 inch guns in single DP mounts
14 Improved power training and elevation 1920 N 60 8 Eliminates ROF penalty for guns below 8 inches in turrets
15 Double gun mounts on CL 1921 Y 80 12 Enables double gun mounts on CL
16 Weight savings in turret fittings 1925 N 90 12 1% Weight saving on turrets
17 Improved Quadruple turrets 1929 N 50 14 Eliminates ROF and reliability penalty for quadruple turrets
18 Increaseed loading mechanization 1930 N 90 12 Gradual national ROF improvement
19 Electric elevation and training 1934 N 70 12 Gradual national ROF improvement
20 Improved power rammers 1938 N 90 12 Gradual national ROF improvement
21 6 in autoloader 1943 N 90 15 Enables autoloader for 6 in guns
22 7 and 8 in autoloader 1945 N 90 15 Enables autoloader for 7 and 8 in guns
23 Improved autoloader 1948 N 90 15 Enables improved autoloader

7) Ship Design Edit

Initial turret limitations as of 1900:

  • Primary wing turrets up to 7 inches
  • Secondary guns up to 7 inches in casemates or single turrets
  • Secondary guns up to 6 inches in multi-barrel turrets
Lv. Tech Year Prolif Chance Cost Effect
1 Heavy secondary battery 1900 Y 70 5 Eliminates size restrictions on secondary casemates or single turrets
2 Medium wing turrets 1901 Y 90 6 - Increases maximum size of primary wing turrets to 10 inches (See *)

- Increases maximum size of multi-barrel secondaries to 10 inches

3 3 centreline turrets 1903 Y 70 12 Enables 3 centreline main turrets on ships
4 Main battery wing turrets 1904 Y 80 10 - Eliminates size restrictions on primary wing turrets (See *)

- Eliminates size restrictions on multi-barrel secondaries

5 Cross deck fire 1905 N 70 6 Enables cross-deck fire for staggered wing turrets (positions F & K or G & J)
6 Superimposed X turret 1905 Y 70 8 - Enables superimposed V turret on ships

- Enables superimposed X turret on BC/BB

7 4 centreline turrets 1906 Y 70 10 Enables 4 centreline main turrets on ships
8 Light cruiser armour configuration 1906 Y 100 6 Enables light cruiser armour configuration
9 Superimposed B turret 1906 Y 70 8 Enables superimposed B turret on ships
10 5+ centreline turrets 1908 Y 70 10 Enables 5 or more centreline main turrets on ships
11 Secondary turrets on BB 1909 Y 70 12 Enables multi-barrel secondaries on BB (previously only available on B, BC, or CA)
12 AON armour 1911 N 60 15 Gives full benefits of all or nothing armour layout (no BE or DE)
13 Efficient hull form 1915 N 80 12 Reduces engine HP requirements
14 Superimposed turrets on CA 1917 Y 100 14 Enables X and B turrets on CA
15 Advanced design calculations 1918 Y 90 15 1% weight saving on hull
? Unit machinery ? ? ? ? Enables unit machinery, which reduces speed losses from machinery damage
16 Magazine box protection 1922 N 90 4 Enables magazine box protection scheme
17 More efficient hull form 1922 Y 80 12 Reduces engine HP requirements
18 All forward main armament 1923 N 80 10 Enables weight benefits from all forward main armament (A, AB, AL, ABC, ABL, ABQ)
19 Triple turrets on CL 1925 Y 80 12 Enables triple turrets on CL
20 Advanced weight saving 1926 Y 90 12 1% weight saving on hull
21 Bulbous bow 1930 Y 90 15 Reduces engine HP requirements
22 Lightweight materials 1934 Y 90 15 1% weight saving on hull
23 Improved hull design methods 1938 Y 90 10 Reduces armour weight by 1%
24 Improved bulbous bow 1940 Y 90 14 Reduces horsepower requirements
25 Modern lightweight materials 1944 N 80 20 1% weight saving on hull

* = (With varying ship tonnage requirements based on caliber and number of barrels)

8) AP Projectiles Edit

Lv. Tech Year Prolif Chance Cost Effect
1 Hardened AP penetrator 1901 Y 80 6 Gradual AP penetration improvement
2 Reliable bursting charges 1902 Y 80 5 Enhances damage from penetrating hits
3 Capped AP projectiles 1905 Y 80 6 Gradual AP penetration improvement
4 Improved AP cap 1906 Y 60 8 Gradual AP penetration improvement
5 Increased oblique penetration ability 1908 N 30 10 Gradual AP penetration improvement
6 Improved AP penetrator alloys 1910 N 30 10 Gradual AP penetration improvement
7 Stable explosive filler 1911 N 40 10 Enhances damage from penetrating hits
8 Ballistic cap 1912 N 70 12 Gradual AP penetration improvement
9 Improved shell quality control 1916 N 50 12 Gradual AP penetration improvement
10 Heavy shells 1916 N 60 15 Gradual AP penetration improvement
11 Improved ballistc cap 1918 N 100 14 Gradual AP penetration improvement
12 Advanced penerator alloys 1922 N 100 14 Gradual AP penetration improvement
13 Super heavy shells 1924 N 60 15 Gradual AP penetration improvement
14 Increased muzzle velocity 1926 N 60 15 Gradual AP penetration improvement
15 Decremental chilling technique 1931 N 70 15 Gradual AP penetration improvement
16 Improved alloys 1933 N 60 15 Gradual AP penetration improvement
17 Diving shells 1933 N 20 15 Enables use of diving shells
18 Shatter resistant shells 1935 N 70 12 Gradual AP penetration improvement
19 Advanced AP cap design 1938 N 70 15 Gradual AP penetration improvement
20 Super hardened penetrator 1940 N 70 15 Gradual AP penetration improvement
21 Advanced penetrator alloys 1943 N 70 15 Gradual AP penetration improvement
22 Improved streamlining 1946 Y 90 12 Gradual AP penetration improvement

9) Light Forces and Torpedo Warfare Edit

Lv. Tech Year Prolif Chance Cost Effect
1 DD of up to 600 tons displacement 1901 Y 80 3 Enables building of DD up to 600 tons displacement
2 DD of up to 700 tons displacement 1906 Y 80 5 Enables building of DD up to 700 tons displacement
3 DD of up to 900t displacement 1908 Y 90 6 Enables building of DD up to 900 tons displacement
4 Double torpedo tube mount 1912 Y 70 5 Enables double torpedo mounts
5 DD of up to 1100t displacement 1912 Y 80 7 Enables building of DD up to 1100 tons displacement
6 Triple torpedo tube mount 1914 Y 70 12 Enables triple torpedo mounts
7 DD of up to 1500t displacement 1914 Y 50 10 Enables building of DD up to 1500 tons displacement
8 Above water tubes on CL 1914 Y 80 10 Enables above water torpedo mounts on CL
9 Superimposed X mount on CL 1914 Y 80 10 Enables superimposed X gun mounts on CL
10 Superimposed guns on DD 1915 Y 80 9 Enables superimposed gun mounts on DD
11 Quadruple torpedo tube mount 1915 Y 80 12 Enables quadruple torpedo mounts
12 Motor torpedo boats 1916 Y 50 10 Enables building of MTB squadrons
13 Superimposed B mount on CL 1917 Y 80 14 Enables superimposed B gun mounts on CL
14 Above water tubes on other ships 1920 Y 80 12 Enables above water torpedo mounts on all ships
15 DD of up to 2000t displacement 1923 Y 50 10 Enables building of DD up to 2000 tons displacement
16 Double gun mounts on DD 1924 Y 80 15 Enables double gun mounts on DD
17 Dual purpose guns as main armament for DD 1925 N 90 12 Enables DP guns as main armament for DD
18 Reloads for deck mounted torpedo tubes 1927 N 80 6 Enables reloads for above water mounted torpedo tubes
19 Weight savings in torpedo mounts 1931 Y 80 12 Reduces torpedo mount weight
20 DD of up to 2500t displacement 1932 Y 50 10 Enables building of DD up to 2500 tons displacement
21 Improved motor torpedo boats 1934 Y 50 10 MTB squadrons will have improved MTB boats
22 Improved power training for torpedo mounts 1936 N 80 18 Increases torpedo readiness
23 Magnetic mines 1938 N 70 14 Improves mine efficiency
24 Quintuple torpedo tube mount 1942 Y 80 14 Enables quintuple torpedo mounts
25 Lightweight materials for torpedo mounts 1947 Y 80 14 Reduces torpedo mount weight
26 Modern control systems 1952 N 80 14 Reduces torpedo mount weight

10) Torpedo Technology Edit

Lv. Tech Year Prolif Chance Cost Effect
1 Improved hydrostatic valve 1900 Y 90 4 Torpedoes now have range@speed 800@25/2000@15
2 Reliable pendulum mechanism 1903 N 90 5 Torpedoes now have range@speed 900@28/2500@15
3 Gyroscope 1904 N 90 5 Torpedoes now have range@speed 1000@28/3000@15
4 Improved compressed air supply 1905 N 90 8 Torpedoes now have range@speed 2000@28/4000@18
5 Larger torpedo warheads 1905 N 90 6 Torpedoes do more damage
6 Contra rotating propellers 1907 N 90 8 Torpedoes now have range@speed 3000@28/5000@20
7 Preheater 1908 N 90 6 Torpedoes now have range@speed 3500@30/7000@22
8 Horizontal turbines 1910 N 90 8 Torpedoes now have range@speed 3800@30/8000@25
9 Wet heater engine 1912 N 90 10 Torpedoes now have range@speed 4000@33/9000@26
10 TNT warhead 1913 N 90 10 Torpedoes do more damage
11 Improved gyroscope 1914 N 90 12 Torpedoes now have range@speed 4500@37/10000@27
12 Lenghtened torpedoes 1916 N 90 12 Torpedoes now have range@speed 4800@37/10500@27
13 Enhanced pressure bottle 1918 N 90 12 Torpedoes now have range@speed 4900@37/11500@27
14 Enhanced warhead explosives 1920 N 90 10 Torpedoes do more damage
15 Improved wet heater engine 1922 N 90 12 Torpedoes now have range@speed 5000@38/12000@27
16 Advanced preheater 1926 N 20 12 Torpedoes now have range@speed 5000@38/13000@27
17 Oxygen fuelled torpedoes 1930 N 20 12 Enables oxygen fuelled torpedoes
18 Improved gyroscope 1935 N 80 5 Improves torpedo reliability
19 Magnetic pistols 1937 N 60 10 Torpedoes do more damage (if used)
20 More powerful compressed air ejection 1937 N 60 10 Centreline torpedo tubes allowed on ships up to 3500 tons
21 Advanced centerline torpedo mounts 1939 N 60 10 Centreline torpedo tubes allowed on ships up to 7000 tons
22 Motobomba FFF 1942 N 10 10 Air dropped torpedoes will run patterns

11) Submarines Edit

Lv. Tech Year Prolif Chance Cost Effect
1 Pressure hull 1901 Y 100 3 5% increase of submarine reliability
2 Early coastal submarine 1901 Y 100 4 Enables building of coastal submarines
3 Periscope 1902 Y 100 5 5% increase of submarine reliability
4 Diving planes 1903 Y 100 5 5% increase of submarine reliability
5 Coastal submarine 1906 Y 100 5 Better operating range for coastal submarines
6 Torpedo aiming system 1907 Y 90 5 5% increase of submarine reliability
7 Diesel engines 1908 N 90 5 5% increase of submarine reliability
8 Improved diving gear 1909 N 90 5 5% increase of submarine reliability
9 Internal torpedo stowage 1911 N 50 5 5% increase of submarine reliability
10 Medium range submarine 1910 N 100 8 Enables building of medium range submarines
11 Improved compressed air supply 1912 N 50 10 5% increase of submarine reliability
12 Minelaying submarine 1914 N 30 8 Enables building of minelaying submarines
13 Improved diesel engines 1916 N 30 12 5% increase of submarine reliability
14 Increased battery capacity 1920 N 80 12 5% increase of submarine reliability
15 Improved pressure hull 1922 N 100 15 5% increase of submarine reliability
16 Improved electric engines 1926 N 100 15 Increase in submarine effectiveness
17 Sound location devices for submarines 1930 N 90 15 Increase in submarine effectiveness
18 Night surfaced torpedo attacks 1933 N 90 10 Increase in submarine effectiveness
19 Improved welding 1934 N 80 15 5% increase of submarine reliability
20 Chemical oxygen generator 1936 N 80 15 5% increase of submarine reliability
21 Snorkel 1937 N 60 15 Increase in submarine effectiveness
22 Wolf pack tactics 1938 N 90 12 Increase in submarine effectiveness
23 Anechoic plating 1940 N 90 15 Increase in submarine effectiveness
24 Teardrop hull 1943 N 80 15 Increase in submarine effectiveness
25 Electric torpedo-reloading system 1943 N 80 10 Increase in submarine effectiveness
26 Elektro boat 1943 N 80 10 Increase in submarine effectiveness
27 High-strength alloyed steel hull 1946 N 80 15 5% increase of submarine reliability

12) ASW technology Edit

Lv. Tech Year Prolif Chance Cost Effect
1 Explosive sweeps 1907 Y 100 5 Gradual increase in national ASW capability
2 Anti submarine nets 1907 Y 100 5 Gradual increase in national ASW capability
3 ASW mines 1908 Y 70 6 Gradual increase in national ASW capability
4 Q-Ships 1908 Y 80 6 Enables Q-ships
5 Hydrostatic pistols 1914 Y 80 6 Gradual increase in national ASW capability
6 Depth charges 1916 Y 80 12 Enables depth charges on ships
7 Early hydrophones 1916 Y 100 10 Gradual increase in national ASW capability
8 Improved depth charges 1917 Y 80 12 Gradual increase in national ASW capability
9 Convoy system 1917 Y 100 16 Reduction in merchant losses to submarines
10 Improved depth charge racks 1918 Y 100 10 Gradual increase in national ASW capability
11 Reliable hydrostatic pistols 1920 Y 100 14 Gradual increase in national ASW capability
12 K-guns 1924 Y 100 10 Enables K-guns
13 Improved hydrophones 1926 N 80 14 Gradual increase in national ASW capability
14 Heavier depth charges 1935 N 80 15 Gradual increase in national ASW capability
15 Forward firing ASW mortar 1941 N 80 15 Enables forward ASW mortar
16 Improved ASW tacics 1943 N 80 8 Increases kill chance of enemy submarines
17 ASW torpedoes 1944 N 80 12 Gradual increase in national ASW capability
18 Depth charge mortar 1945 N 80 10 Enables trainable depth charge mortars
19 Improved ASW torpedoes 1950 N 80 15 Gradual increase in national ASW capability

13) Explosive Shells Edit

Lv. Tech Year Prolif Chance Cost Effect
1 Lyddite bursting charges 1901 Y 80 5 Gradual increase in shell damage
2 Safe fuze arming devices 1902 Y 80 6 Gradual increase in shell damage
3 Improved explosive filler packing 1905 Y 100 9 Gradual increase in shell damage
4 TNT bursting charges 1906 Y 80 9 Gradual increase in shell damage
5 Reliable delay fuzes 1907 Y 70 9 Increase in AP shell damage
6 Quality steel for shells 1908 Y 70 9 Gradual increase in HE shell damage
7 Base fuzes 1910 Y 80 9 Enables SAP ammo
8 Improved fuzes 1912 Y 70 9 Gradual increase in HE shell damage
9 Enhanced high explosive filler 1914 Y 70 9 Gradual increase in HE shell damage
10 Improved shell wall castings 1916 Y 70 12 Gradual increase in HE shell damage
11 Improved fuze reliability 1920 Y 70 12 Reduced dud rate
12 Enhanced explosive filler 1923 Y 90 12 Gradual increase in shell damage
13 Automated fuze setting 1934 N 90 12 Increases HAA effectiveness
14 Streamlined shells 1935 N 90 12 Increases gun range by 5%
15 TNT filler 1939 Y 90 12 Gradual increase in shell damage
16 Improved automated fuze setting 1941 N 80 12 Increases HAA effectiveness

14) Fleet Tactics Edit

Lv. Tech Year Prolif Chance Cost Effect
1 Active mine warfare 1902 Y 80 8 Increased use of defensive minefields
2 Improved signalling 1904 Y 80 8 Makes signalling errors less likely
3 Destroyer screen 1906 Y 90 12 Enables screen formation for DD
4 Scouting force 1907 Y 80 10 Enables a separate scouting force with CA and BC
5 Mine rails on CL and DD 1908 Y 50 15 Enables fitting of mine rails on CL and DD
6 Fleet cruising formation 1910 Y 90 15 Enables crusing formation in parallel columns for the fleet
7 Battle turn away 1910 Y 50 15 Enables battle turn away maneuvre
8 Effective sigint 1912 N 50 15 Better pre battle enemy strength asessment
9 Smoke Floats 1912 N 50 15 Gives light cruisers the ability to launch smoke floats
10 Concentration firing 1914 N 50 15 Reduces the penalty for more than one ship firing at the same target
11 Advanced signalling 1915 Y 50 15 Makes signalling errors less likely
12 Shell dyes 1920 Y 80 12 Reduces the penalty for more than one ship firing at the same target
13 Carrier force 1923 N 70 12 Carriers will operate in separate force
14 Voice radio 1928 Y 80 12 Makes signalling errors less likely
15 Improved fleet logistics 1930 Y 80 12 Improves fleet logistics and reduces risk of breakdowns
16 Flexible station keeping 1930 Y 80 15 Enables looser division formations and reduces enemy accuracy
17 Effective smoke generators 1934 Y 80 15 More effective smoke screens from all ship types
18 Underway replenishment 1935 Y 80 12 Improves fleet logistics
19 Effective camouflage schemes 1938 Y 80 15 Reduces enemy sighting range and hit chance
20 Fleet train 1940 Y 80 10 Improves fleet logistics and invasion capability
21 IFF system 1941 N 80 8 Increases CAP effectiveness
22 Three tier air defense perimeter 1941 Y 80 8 Increases CAP And AA effectiveness (with air search radar)
23 Circular AA screen 1942 N 90 4 Enables circular screens and improves AA effectivness. Allows BB to screen CV.
24 Integrated CIC 1943 N 80 8 Increases CAP effectiveness
25 Improved radar vecoring of CAP 1944 N 80 15 Increases CAP effectiveness (with air search radar)
26 Chaff dispensers 1944 N 70 8 Reduces missile hit chances on ships

15) Anti Aircraft Artillery Edit

Lv. Tech Year Prolif Chance Cost Effect
1 Heavy AA MG 1918 Y 100 3 Enables light AA weapons
2 HA rangefinder 1918 Y 100 6 Improves HAA effectiveness
3 20 mm automatic cannon 1920 Y 100 6 Improves LAA effectiveness
4 40 mm automatic cannon 1922 Y 60 12 Enables medium AA weapons
5 HA geared sight 1924 Y 80 8 Improves HAA effectiveness
6 3 and 4 in twin dual purpose mounting 1926 Y 70 8 Enables 3 and 4 in twin DP mounts
7 Early AA director 1926 Y 90 10 Enables AA director on ships
8 Fixed zone AA barrage 1929 Y 80 8 Improves HAA effectiveness
9 5 in dual purpose mounting 1933 N 60 8 Enables 5 in DP mounts
10 Improved 20 mm automatic cannon 1934 Y 100 8 Improves LAA effectiveness
11 6 in dual purpose mounting 1934 N 30 10 Enables 6 in DP mounts
12 Improved anti aircraft director 1935 N 80 10 Improves HAA and MAA effectiveness
13 Creeping Zone AA barrage 1935 Y 80 10 Improves HAA effectiveness
14 Improved 40 mm automatic cannon 1936 Y 70 10 Improves MAA effectiveness
15 Power mounts for light and medium AA 1939 Y 70 10 Improves LAA and MAA effectiveness
16 Advanced anti aircraft director 1940 N 80 12 Improves HAA and MAA effectiveness
17 Quadruple LAA mountings 1941 Y 70 12 Improves LAA effectiveness
18 Modern quadruple MAA mountings 1942 Y 70 10 Improves MAA effectiveness
19 Large shrapnel AA shells 1942 Y 30 6 Gives limited AA capability to heavy main guns
20 3 in autoloaded DP gun 1946 Y 70 12 Improves effectiveness of 3 in DP guns
21 4 in autoloaded DP gun 1950 Y 70 12 Improves effectiveness of 4 in DP guns
22 5 in autoloaded DP gun 1953 Y 70 12 Improves effectiveness of 5 in DP guns

16) Radar and Electronics Edit

Lv. Tech Year Prolif Chance Cost Effect
1 Early surface search radar 1937 N 100 9 Enables surface search radar (Search radar 1)
2 Improved surface search radar 1939 N 80 8 Improves surface search radar (Search radar 2)
3 Early air search radar 1939 N 80 8 Enables air search radar
4 Airborne radar 1939 N 60 12 Enables airborne radar
5 Radar assisted gunnery 1940 N 80 10 Increases gunnery accuracy with radar (FC radar 1)
6 Cavity magnetron 1940 N 40 8 Increases radar range (Search radar 3)
7 Slow fade display 1940 N 60 6 Increases radar detection chance
8 Improved air search radar 1940 N 80 10 Improves air search radar
9 VHF Radio in aircraft 1940 N 80 6 Increases CAP effectiveness
10 Early blind fire capability 1941 N 70 10 Enables blind fire (FC radar 2)
11 Shipborne HF/DF 1942 N 60 8 Improves intelligence and ASW capability
12 Improved blind fire capability 1942 N 70 10 Improves blind fire accuracy (FC radar 3)
13 Proximity fuzes 1943 N 80 14 Increases 5 and 6 in AA effectiveness
14 S band radar 1944 N 70 10 Improves radar capabilities (Search radar 4, FC radar 4)
15 Anti missile jamming system 1944 N 70 10 Reduces hit chance of missiles and guided bombs
16 Monopulse radar 1950 N 70 12 Improves radar range (Search radar 5)
17 Imrpoved anti missile jamming system 1952 N 70 12 Enables improved anti missile jamming systems

17) Naval Aviation, Lighter than Air Edit

Lv. Tech Year Prolif Chance Cost Effect
1 Early airships 1911 Y 70 8 Enables airships
2 Improved airship tail design 1914 Y 70 6 Improves airship performance
3 Improved airship engines 1915 N 70 8 Improves airship performance
4 Airship bomb armament 1915 N 70 8 Enables airship bomb armament
5 Aircraft carrying airships 1922 N 70 12 Enables aircraft carrying airships
6 Large scale helium production 1923 N 60 10 Airships are more reliable
7 Improved airship diesel engines 1926 N 60 10 Improves airship performance

18) Naval Aviation, Heavier than Air Edit

Lv. Tech Year Prolif Chance Cost Effect
1 Seaplane scouts 1915 N 70 6 Enables seaplane bases
2 Aircraft bombing of ships 1916 N 70 6 Enables air bombing of ships with light bombs
3 Early air launched torpedoes 1917 N 70 6 Enables air launched torpedoes
4 Aircraft catapult 1923 N 70 10 Enables seaplane catapults on ships other than carriers
5 Later air launched torpedoes 1930 N 70 10 Improves hit chances of air launched torpedoes
6 Dive bombing 1930 N 70 8 Enables dive bombers
7 Air/Sea rescue 1935 Y 20 8 Improves pilot survival and thus mitigates experience degradation from air losses
8 Improved dive bombers 1938 N 70 10 Enables improved dive bombers
9 Improved air launched torpedoes 1938 N 70 10 Improves hit chances of air launched torpedoes
10 Coordinated airstrike management 1939 N 70 10 Allows coordinated strikes from several carriers
11 Aerial depth charges 1941 N 80 10 Increases ASW value of aircraft carriers and air bases
12 AP bombs 1942 N 90 6 Enables use of AP bombs by aircraft
13 Skip bombing 1942 N 50 10 Increases effectiveness of level bombers in anti shipping attacks
14 Leigh light 1942 N 80 8 Increases ASW effect of air bases
15 Bombentorpedo 1944 N 40 10 Near misses from glide bombing have a chance of being converted to torpedo hits

19) Shipboard Aircraft Operation Edit

Lv. Tech Year Prolif Chance Cost Effect
1 Seaplane carrier 1914 Y 70 6 Enables small seaplane carriers
2 Improved seaplane carrier 1916 Y 70 8 Enables larger seaplane carriers
3 Flight deck 1918 Y 70 10 Enables CVL conversions
4 Purpose built aircraft carrier 1920 Y 80 8 Enables CVL construction
5 Aircraft carrier conversion 1921 Y 70 10 Enables CV conversions
6 Transverse arrestor wires 1925 N 70 8 Lowers risk of landing accidents
7 Large aircraft carrier 1926 Y 100 12 Enables purpose built CV
8 Better aircraft handling practices 1927 N 70 8 Increases aircraft capacity and ready times of carriers
9 Improved landing guidance systems 1929 N 70 8 Lowers risk of landing accidents
10 Deck park 1930 Y 70 10 Increases aircraft capacity of carriers
11 Improved arrestor wires 1931 N 70 10 Lowers risk of landing accidents
12 Deck edge lifts 1934 N 70 10 Improves readying times of aircraft
13 Improved carrier design 1936 Y 80 10 Increases maximum carrier size
14 Flight deck catapults 1936 Y 50 6 Enables catapults on aircraft carriers
15 Air intercept control system 1938 Y 80 12 Increases CAP effectiveness
16 Improved aircraft handling practices 1940 N 70 12 Increases maximum carrier size
17 Two phase search 1942 N 70 4 Enables two phase search
18 CIC 1942 N 70 12 Increases CAP effectiveness
19 Deck launched interceptors 1942 N 70 8 Increases CAP effectiveness
20 Improved carrier design 1944 Y 80 10 Increases maximum carrier size
21 Angled flight deck 1950 Y 80 15 Enables angled flight deck, which allows more than 2 flight deck catapults

20) Missile Technology Edit

Lv. Tech Year Prolif Chance Cost Effect
1 Guided bomb 1943 N 70 12 Increases air attack effectiveness
2 Early SAM 1948 N 70 12 Enables early SAM mounts
3 Early SSM 1949 N 70 12 Enables early SSM mounts
4 Improved SAM 1954 N 70 12 Increases SAM hit rate
5 Reliable SSM 1955 N 70 12 Increases SSM hit rate
6 Improved guidance systems 1957 N 70 12 Increases missile hit rate
7 Improved on board electronics 1960 N 70 12 Increases missile hit rate

21) Amphibious Operations Edit

Lv. Tech Year Prolif Chance Cost Effect
1 X-Lighters 1915 Y 70 6 Improves invasion capability
2 Elpidifor boats 1916 Y 70 6 Improves invasion capability
3 Daihatsu barges 1925 Y 70 6 Improves invasion capability
4 Motor Landing Craft 1930 Y 70 8 Improves invasion capability
5 Amphibious tractors 1935 Y 70 10 Improves invasion capability
6 Combat supply loading 1938 N 70 8 Improves invasion capability
7 Higgins boats 1941 Y 70 6 Improves invasion capability
8 Assault landing craft 1942 Y 70 10 Improves invasion capability
9 Specialized landing craft 1943 Y 70 10 Improves invasion capability

22) Guns Edit

Guns are treated as a tech category for allocating research budgets, but they have a different structure than other fields of technology, with each gun calibre from 2" to 20" having a quality, which can range from -2 to +1. For more information, see the main Guns article.  

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